BYU hasn't won in RES since like 2006.
That's what makes conferences fun. Every one in the Big 12 will have to come to Provo. BYU is going to win some big games. (Marriott Center is going to be epic vs. KU, KSU, Houston, Baylor...)
But you also have to win nearly every game on the road. Including the ugly back-to-back road games.
What makes Utah's back to back to back to back CCG appearances in consecutive full seasons, and back to back championships special, is they have now won both championships on both legs of home and homes.
That's why you almost never see lower tier schools winning back to back in a P5.